Centrifugal pipe-casting machine



Feb. 11, 1930. J. H. UHRIG CENTRIFUGAL PIPE CASTING MACHINE Filed May 18. 1928 4 Sheets-Sheet l Feb. 11, 1930.

J. H UHRIG ,CENTRIFUGAL PIPE CASTING MACHINE Filed May 18. 1928 4Shgets-Sheet 2 fizz/822601" John 7f. liar 9,

ab. 11, 1930. J. H. UHRIG 1,746,374

CENTRIFUGAL PIPE CASTING MACHINE Filed May 18, 1928 4 Sheets-Sheet 4 Patented Feb. 11, 1930 STATES i'l'fiHllT H. "UHRIG', Oll BEVERLY, NEW JERSEY, ASSIGNOR T0 "(UNITED STATES CAST IRON lPIlZE ta FOUNDRY (JOMIANY, OF BURLINGTON, NEW JERSEY, COREURATION OF NEW JERSEY CENTBIFUGAL PIPE-CASTING IMAGHHIE Application filed May 18, 19%. Serial Np. ftififiWQ My invention relates to pipe casting machines of the well known de Lavaud type in which relatively movable water jacketed molds and metal delivering runners are employed so that the runner at the he inning of the pipe casting operation exten s prac tically throughout the length of the mold and is gradually withdrawn therefrom during the pouring of the metal so that the metal is delivered to the surface of the mold in what might be called a spiral coil. In machines of this kind it is found necessary that the mold and runner should be inclined to a horizontal plane to facilitate the delivery of metal through the runner with sufi'icient speed and, depending on. the fluidity oi the metal delivered to the mold, there is more or less tendency oi the molten metal to flow longitudinally in the mold loeztore it sets and lti thereby to bring about the formation of pipe with walls of uneven thickness. l have devised and improved methbd of casting pipes in machines of this kindiin' accordance with which l diminish the inclination ot the mold during the pouring of the pipe in such a way as to counteract the tendency to an ObjQClZIOIb able longitudinal flow oi the metal in the mold before it sets, my improved method preferably also involving the pouring of the metal into the runner at a point hearing a fixed relation to the end of the mold through which the runner passes so that as the runner is withdrawn from the mold the metal poured into it has a progressively shorter path of travel before reaching the mold. ll/ly improved method forms the subject matter oi a pending application filed May 18, 1928, Serial No. 278,708, my present invention relating to improvements in the construction of the casting machinery which 1 have devised to facilitate the practice of my improved method. These mechanical means will be best understood as described in connection with the drawings which illustrate a machine embodying my invention and in which- Figure it is an elevation of my improved casting machine.

Figures 2, 3, and 4, illustrate the same ma chine on an enlarged scale, each of said figures illustrating a section of the machine and Figures 2 and 8- showing certain details of construction in section.

Figure 5 is a cross sectional elevation on the line 55 of Fig. 3, and

Figure t is a cross sectional elevation on the line 66 of Fig. 3..

it, A and A are supporting tracks for the frame of the machiife. 'lhese'tracks, as illustrated, are formed on arcs of concentric circles, the tracks, as distinguished from the supports, being indicated at a, a ,and ah B is a frame provided with supporting Wheels ll B and B which rest on the concentric tracks. The frame supports longitudinal tracks indicated at B and have stops as indicated at hi and B at the ends of the tracks. ll indicates a bracket secured to the under side of the frame B to which is coupled a connecting rod B actuated by the piston rod C or a cylinder and piston indicated at C,

constituting a power motor by which the frame B can be longitudinally shifted at the will of the operator. l) is a frame or bracket secured to the left hand end of the frame B which supports the end D of a runner D lroin the end D of which the inolten metal is delivered into the mold. E is the ordinary water box carriage longitudinally movable on the frame ll and supported on the tracks l3 by means of its wheels indicated at E E are rollers journalled in the Water box serving as supports for the mold F. E is a lug secured to the bottom ofthe water box carriage. F is the rotary mold extending through the water box and rotated by a motor Gr to the spindle G of which is attached a gear G meshing with the gear G which in turn engages a gear wheel on the driving ring F attached to the bell end of the mold, as best shown inFig. 3. -H is a rack bar pivoted to the lug E as shdwn in Fig. 3, and supported and guided for longitudinal movement in the frame B by means of the rollers indicated at H best shown in Figures 3 and 5, and the roller H Motion is given to the rack bar and through it to the frame by the mechanism best shown in Figure 5 consisting of a gear wheel H turning on the spindle Htand geared with the gear wheel H ,moun't ed'-onthe spindle H, which in turn is rotated by l9.

gear wheel H geared with gear wheel H, the shaft H of which is coupled to a sprocket wheel H", o erated by a sprocket chain through sproc et wheel H on a shaft H which is coupled to a motor indicated at H. The employment of a guided rack bar as ameans or reciprocating the mold carriage is a minor feature of novelty in my construction.

I indicates a trough which I preferably use, as shown in Figure 2, at the end of the mold into which the runner enters as a convenient device to catch any metal which may run out of the end of the runner after it is withdrawn from the mold.

J is a carriage supported on the tracks B of the frame B by wheels indicated at J,

the carriage supporting a runner J 2 which registers with the open top of the runner D and supporting also a tilting ladle indicated at J which is pivoted to the carriage at its pouring lip J and is tilted by means of a lever J actuated, as shown, by a threaded rod J engaged with a nut wheel J 7 which is actuated through intermediate gearing, not shown, attached to a shaft J which in turn is coupled by link J with a motor indicated at J K, is a sto secured to the track A and serving as a imit stolp for the longitudinal motion of the frame L, L indicate an electro-magnet and armature secured to the carriage J and carriage E by which they are coupled during such portion of the casting operation as may be esired.

The operation of my machine will be readily followed. At the beginning of the pouring operation the mold carriage occupies the position shown in Figure 1, in which position the runner D extends practically throughout its length nearly to the bell end of the mold. The carriage J is coupled to the mold, the

mold is rotated, the carriage E with its connected mold is moved toward the right by the rack bar and connecting mechanism described and the ladle J is graduall tilted to pour the metal into the runner an throu h it into the mold. At the beginning of t e operation the frame B is in its most extremely tilted position that is in the position in which its end supporting the runner and ladle is elevated and its opposite end depressed so as to facilitate the flowof metal through the runner into the mold. As the pouring progresses the operator, through the piston C, shifts the frame B toward the left so that, moving on the inclined tracks which support it, it is lifted to a progressively less ang e to the horizontal, the points at which the tilt is varied and the degree of tilt being within the control of the operator. As the mold recedes from the relatively stationary runner the carriage J moves with the mold so that the metal poured, from the ladle J enters the runner at a point bearing a fixed relation to the end of the moldand thus at progressively closer points to the delivery end of the runner, thus cutting down the frictional resistance to the flow of metal from the runner and making it ossible for the diminishing inclination of t e runner to still deliver the proper amount of metal to the mold.

riage should move without an accompanying movement of the ladle carriage.

Having now described my invention, what I claim as new and desire to secure by Letters Patent, is:

1. In a centrifugal pipe casting machine of the type in which the molten metal is progressively delivered to the rotating mold through a relatively retractable runner, the improvement which consists in supporting the mold and relatively retractable runner on an angularly adjustable frame and providin in combination therewith power actuate mechanism for Va ying the angle of inclination of the frame d of the mold.

2. In a ipe casting machine having the features of claim 1, means for tiltin the supporting frame consisting of incline supports for the frame and power means for uring the pouring shifting the frame; longitudinally on said support.

3. In a pipe casting machine having the features of claim 1, means for tilting the supportin frame consisting of a series of supports or the frame curving in concentric arcs and power means for shifting the frame longitudinally on said concentric supports.

4. A pi e casting machine havin the features of c aim 1 in combination wit a pouring ladle and ladle supporting means adapted to hold the ladle in fixed position with respect to the mold during the pouring of the mold.

5. A centrifugal pipe casting machine comprising in combination a frame angularly adjustable in a vertical plane, a carriage longitudinally movable on said frame, a rotary mold, supported on said carriage, a runner supported on the frame adapted to deliver metal to the mold during the longitudinal movement of said mold and power actuated means adapted to vary the angular inclination of the frame during the pouring of the mold. v

6. A pipe casting machine havin the constructive features of claim 5 and aving in combination therewith a pouring ladle and a-pouring ladle support longitudinally movable with respect to the frame and means for coupling the ladle support and the mold carriage during the pouring of the mold so that the ladle will be held during the pouring in fixed relation to the mold.

7. A pipe casting machine havin the-constructive features of claim and aving in combination'therewith a pouring ladle and a pouring ladle support supported on and Iongitudinally movable with respect to the 'frame and means for coupling the'ladle supported on a series of are shaped concentric tracks and is angularly adjusted b power actuated means acting to shift it longitudinal- 1y on said concentric tracks.

10. A ipe casting machine having the features oclaim 5, in combination with means for reciprocating the mold carriage comprising a rack bar supported for longitudinal movement on the frame and attached to the carriage and power means for reciprocating x the rack bar supported also on the frame.

JOHN H. UHRIG. 

